2018年4月12日
Tree Restoring
摘要： 题目描述 Aoki loves numerical sequences and trees.One day, Takahashi gave him an integer sequence of length N, a1,a2,…,aN, which made him want to construc 阅读全文
posted @ 2018-04-12 23:44 oc_co 阅读(136) 评论(0) 推荐(0) 编辑